How much does it cost to fix boiler error code LF?

Typical repair cost for the boiler LF fault is £100-280 including labour.

LF High

Boiler Fault Code LF

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code LF appears across 2 boiler brands and 5 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has tried to ignite three times but failed to stay alight, so it has shut down for safety. (As reported on Ideal Mexico HE)

Pick your boiler brand for the LF fix

Baxi LF 1 model Ideal LF 4 models

Source

Information for the LF fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026